- TITLE:
- Ping-Pong Sample Times on a Linear Array Halve the Nyquist Rate
- AUTHORS:
- Jeffrey O. Coleman
- ABSTRACT:
- Staggering the sample times for alternate elements of a linear antenna array is shown to halve the usual Nyquist sample-rate bound of twice the one-sided signal bandwidth while preserving alias-free mapping between spectral components and plane waves in the far field. The approach can be used on transmit or receive and with lowpass or bandpass sampling, and it can involve analog up- or down-conversion between data conversion and the array. The usual element-spacing bound of half a wavelength at the upper RF band edge is replaced with a quarter-wavelength bound at the center of the Nyquist sampling band referred to RF, a reduction only for bandpass sampling.
- DOWNLOADABLE PREPRINT (expected to be available in the spring of 2004):
- PDF (181595 bytes),
- STATUS:
- Presented to the 2004 IEEE Int'l Conf. on Speech, Acoustics, and Signal Processing (ICASSP 2004), Montreal, Quebec, Canada, May 17--21, 2004.
- DATE OF ENTRY:
- June 2004.